Results 31 to 40 of about 43,378 (290)
Design of a Linear Ultrasonic Piezoelectric Motor
Journal of Intelligent Material Systems and Structures, 2010 A new geometrically unique ultrasonic motor (USM) was designed, prototyped, and tested. USMs operate by vibrating a drive tip in an elliptical motion while in periodic contact with a driven surface. Piezoelectric elements are used to create the elliptical motions and are driven at near resonance frequencies to create the needed displacements for the ...
Scott L. Sharp +2 more
openaire +2 more sources
Full and half-wavelength ultrasonic percussive drills [PDF]
, 2018 Ultrasonic-percussive drills are a leading technology for small rock drilling applications where power and weight-on-bit are at a premium. The concept uses ultrasonic vibrations to excite an oscillatory motion in a free-mass, which then delivers ...
Harkness, Patrick +2 more
core +1 more source
Sensors, 2020 In some applications of linear ultrasonic motors (LUSMs), not installing speed/position sensors can reduce the size and cost of the system, changes in load will cause fluctuations in the speed of the LUSM.
Yuzhao Yan +4 more
doaj +1 more source
Actuators for smart applications [PDF]
, 2010 Actuator manufacturers are developing promising technologies\ud which meet high requirements in performance, weight and\ud power consumption. Conventionally, actuators are characterized\ud by their displacement and load performance.
Akkerman, Remko +3 more
core +2 more sources
Encoderless position estimation and error correction techniques for miniature mobile robots [PDF]
, 2013 This paper presents an encoderless position estimation technique for miniature-sized mobile robots. Odometry techniques, which are based on the hardware components, are commonly used for calculating the geometric location of mobile robots. Therefore, the
Arvin, Farshad, Bekravi, Masoud
core +1 more source
Micromachines, 2022 In this study, a linear ultrasonic motor (USM) with carbon-fiber-reinforced/poly-phenylene-sulfide (PPS/CF) was developed and the feasibility of using PPS/CF to achieve a lightweight USM was tested.
Zhaochun Ding +3 more
doaj +1 more source
A Self-Propelled Traveling-Wave Linear Ultrasonic Motor Based on End Excitation
MicromachinesUltrasonic motors have attracted considerable attention in precision actuation applications because of their advantages over conventional electromagnetic motors, such as compact structure, high positioning accuracy, immunity to electromagnetic ...
Danhong Lu +5 more
doaj +1 more source
A New Linear Ultrasonic Motor Using Hybrid Longitudinal Vibration Mode
IEEE Access, 2016 This paper proposes a new linear ultrasonic motor using hybrid mode of the first symmetric and anti-symmetric longitudinal modes. The stator is constructed by two Langevin transducers in combination with two isosceles triangular beams.
Xiangyu Zhou, Yi Zhang
doaj +1 more source
Ultrasonic Planetary Core Drill: Overview and Results from Field Trial [PDF]
, 2017 In the effort to explore the subsurface of terrestrial bodies, we seek to obtain better samples from ever greater depths. Many organisations are working towards technologies that can achieve this goal whilst ensuring compatibility with the likely ...
Harkness, Patrick +4 more
core
Pediatric Blood &Cancer, EarlyView.ABSTRACT Arteriovenous malformations (AVMs) are rare, high‐flow, vascular anomalies that can occur either sporadically or as part of a genetic syndrome. AVMs can progress with serious morbidity and even mortality if left unchecked. Sirolimus is an mTOR inhibitor that is effective in low‐flow vascular malformations; however, its role in AVMs is unclear.
Will Swansson +3 more
wiley +1 more source